AU610305B2 - Cinnoline derivative, process for preparing the same and herbicidal composition containing the same - Google Patents

Description

WUDLiv L. uL lu File: D.B. S-44 Fee: $340.00 APPICAT7O ACCEPTED AND AEDME

TS

A LLO W ED 0040055 12/0 <C CS' 1 COMMONWEALTH OF AUSTR A I d FORM

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PATENTS ACT 1952 COMPL ETE S PE C I F I CAT IO N FOR OFFICE USE: Class Int.Class Application Number: Lodged: Complete Specification Lodged: Accepted: Published: Priority: Related Art: Related Art: 0 0 Name of Applicant: 0 Address of Applicant: 0 Actual Inventor:

IA

SUMITOMO CHEMICAL COMPANY, LIMITED 15, Kitahama 5-chome, Higashi-ku, Osaka-shi, Japan Masato Mizutani, Masao Shiroshita, Masaharu Sakaki, Nobuaki Mito and Hiroki Okuda *Adress for Service: SHELSTON WATERS, 55 Clarence Street, Sydney ,Complete Specification for the Invention entitled: "CINNOLINE DERIVATIVE, PROCESS FOR PREPARING THE SAME AND HERBICIDAL COMPOSITION CONTAINING THE SAME" The following statement is a full description of this invention, including the best method of performing it known to us:- 1 tL11& .Uc y l I Personal Signature (h) of Declarant (no seal, witness or legalisation), So Signatur of Declarant) /N O SHO NISHIZAWA To THE COMMISSIONER OF PATENTS. YOSHIREP NISHIZAWA REPRESENTATIVE DIRECTOR SHELSTON WATERS PATENT ATTORNEYS CLARENCE STREET, SYDNEY

AUSTRALIA

Cables: 'Valid' Sydney Telex: 24422 1 c-- -a! la CINNOLINE DERIVATIVE, PROCESS FOR PREPARING THE SAME AND HERBICIDAL COMPOSITION CONTAINING THE SAME BACKGROUND OF THE INVENTION The present invention relates to novel cinnoline derivatives, processes for preparing the cinnoline derivatives and herbicidal compositions containing the cinnoline derivatives as an active ingredient. The present invention further relates to a method for controlling undesired weeds using the cinnoline derivatives and use of the cinnoline derivatives as a herbicide.

0 I S 10 Some l-aryl-1,4-dihydro-4-oxocinnoline-3o carboxylic acid derivatives have been hitherto reported o oo .o 0° in literature such as Zh. Obshch. Khim., vol.37, p.2487 So" (1967), J. Chem. Soc. Chem., Comm., p.752 (1974), .000 oo. 0 Synthesis, p.52 (1983), U.S. Patent No. 4,604,134 and European Patent Publication No. 197226 Al. However, it has not been reported that cinnoline derivatives in 0 00 a oo accordance with the present invention have herbicidal 0 activity.

0 0 SUMMARY OF THE INVENTION 20 As a result of the eager study for providing a S novel herbicide, it has now been found that cinnoline 000 It derivatives having the formula 4 f t t0 YO 0

COX

N

3A 1 A 2 2

R

2 in which X is -OH,

-OR

1 or -N R3 wherein M is an alkali metal cation, an alkaline earth 11LL-?; ii 2-

R

4 4 5 6 metal cation or HN-R 5 in which R 4

R

5 and R 6 are the

\R

6 same or different and each is a hydrogen atom, a C1-C 6 alkyl group, a C 3

-C

4 alkenyl group, a C 3

-C

4 alkynyl group, a C 3

-C

8 cycloalkyl group, a benzyl group or a phenyl group; R 1 is a C 1

-C

9 alkyl group, a C3-Cg alkenyl group, a C 3

-C

4 alkynyl group, a C 1

-C

3 alkoxy-

(C

1

-C

4 alkyl group, a C 1

-C

3 haloalkyl group, a C3-Cg cycloalkyl group, a benzyl group or a phenyl group; and

R

2 and R3 are the same or different and each is a hydrogen atom, a C1-C 6 alkyl group, a C 3

-C

4 alkenyl group, a C 3

-C

4 alkynyl group, a C 3

-C

8 cycloalkyl group, a benzyl group in which at most two of hydrogen atoms o o 15 at the a-position thereof may be substituted by methyl group, a C 2

-C

3 hydroxyalkyl group or a phenyl group in which at most three of hydrogen atoms thereof may be substituted by the same or different C 1

-C

2 alkyl group or halogen atom; 20 -Y is a C 1

-C

4 haloalkyl group; A 1 and A 2 are the same or s. different and each is a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a trihalomethyl group, a o Cl-C 2 alkylthio group or a C 1

-C

2 haloalkoxy group exhibit both excellent herbicidal activity and 0 0 selectivity between crops and weeds, and thus the present S° invention has been accomplished.

In accordance with the present invention, there are pr-viaed a cinnoline derivative having the formula a process for preparing it, a herbicidal composition containing it as an active ingredient, a method for controlling undesired weeds using it and use of it as a herbicide. i DETAILED DESCRIPTION Among the cinnoline derivatives having the formula of the present invention, cinnoline derivatives having -OH, or -OR 1 as X are preferable because of the highly herbicidal activity against

I

3 weeds. Further, among them, cinnoline derivatives having a fluorine atom, a chlorine atom, a bromine atom, a trifluoromethyl group, a difluoromethoxy group or a trifluoromethoxy group as A 1 and a hydrogen atom or a fluorine atom as A 2 are more preferable. Moreover, among them, cinnoline derivatives having a C1-C 2 polyfluoroalkyl group (especially a difloromethyl group, a trifluoromethyl group or a 2,2,2-trifluoroethyl group) as Y are still more preferable.

Hereinafter, processes for preparing the cinnoline derivatives of the present invention are explained.

In the compounds of the present invention, a 1 cinnoline derivative having the formula 4 YO O

COOR

1 N (I-a) Al A 2 in which R 1 Y, A 1 and A 2 are as defined above can be prepared by subjecting a hydrazone having the formula (II): YO 0

COOR

1

N

Z NH (11) Al J A 2 in which R 1 Y, A 1 and A 2 are as defined above and Z is a fluorine atom, chlorine atom or bromine atom to ring closure with a dehydrohalogenating agent.

The above reaction is usually carried out without any solvent or in a solvent, at a temperature of 0 to 150 0 C, for a period of 10 minutes to 20 hours. The i 4 dehydrohalogenating agent may be used in an amount of 1 to 10 equivalents to one equivalent of the hydrazone

(II)

Examples of the solvent are, for instance, aliphatic hydrocarbons hexane, heptane, ligroin, petroleum ether), aromatic hydrocarbons benzene, toluene, xylene), halogenated hydrocarbons (e.g.

chloroform, carbon tetrachloride, dichloroethane, chlorobenzene, dichlorobenzene), ethers diethyl ether, diisopropyl ether, dioxane, tetrahydrofuran, diethylene glycol dimethyl ether), ketones acetone, SoOo methyl ethyl ketone, methyl isobutyl ketone, isophorine, cyclohexanone), esters ethyl formate, ethyl S°acetate, butyl acetate, diethyl carbonate), nitro o° 15 compounds nitroethane, nitrobenzene), nitriles oo acetonitrile, isobutylnitrile), tertiary amines -0 0 pyridine, triethylamine, N,N-diethylaniline, tributylamine, N-methylmorpholine), acid amides (e.g.

formamide, N,N-dimethylformamide, acetamide), sulfur o°00o 20 compounds dimethyl sulfoxide, sulfolane), water, 0o Oand the like. Their mixtures are also usable.

Examples of the dehydrohalogenating agent are, o for instance, organic bases pyridine, triethyl ooo amine, N,N-diethylaniline), inorganic bases sodium S 25 hydroxide, potassium hydroxide, sodium carbonate, Soo°° potassium carbonate, sodium hydride), alkali metal alkoxide sodium methoxide, sodium ethoxide), and the like.

For the purpose of conducting the reaction more efficiently, quaternary ammonium salts and crown ethers can be added. Examples of the quaternary ammonium salts are, for instance, benzyltriethylammonium chloride, tetrabutylammonium chloride, and the like. Examples of the crown ethers are, for instance, dibenzo-18-crown-6, and the like.

After completion of the reaction, the reaction mixture is subjected to ordinary post-treatment such as addition of water followed by collection of precipitated i c~ 5 crystals, extraction with an organic solvent, or concentration. If necessary, a purification procedure such as chromatography or recrystallization may be adopted. Thus the cinnoline derivative of the present invention can be obtained.

In the compounds of the present invention, a cinnoline derivative having the formula YO 0 6COOH

N

0oOo N (I-b) 0 00 000 AA 2 00 0 1 °o oo 0 A'

A

2 0 0 o oo 0 in which Y, Al and A 2 are as defined above o°°o can be' prepared by hydrolyzing the cinnoline derivative The above reaction is carried out in water or a 0°ooo 20 mixed solvent of water and an alcohol methanol, oo oo ethanol, isopropanol, diethylene glycol, glycerin), an 0 00 ether tetrahydrofuran, dioxane), a nitrile (e.g.

0o°o acetonitrile), an acid amide formamide, N,N- 0o 00 dimethylformamide) or a sulfur compound dimethyl 0 0 sulfoxide). Usually the acid or the alkali is added in 00 an amount of 1 to 100 equivalents to one equivalent of the cinnoline derivative The reaction temperature is 20 to 100 0 C. The reaction period is 30 minutes to hours.

Examples of the acid are, for instance, hydrochloric acid, sulfuric acid, nitric acid, and the like. Examples of the alkali are, for instance, sodium hydroxide, potassium hydroxide, and the like. When the alkali is used, the reaction mixture is neutralized with hydrochloric acid, sulfuric acid, nitric acid, formic acid, acetic acid, or the like after completion of the reaction.

After completion of the reaction, the reaction _irnr~ 6 mixture is subjected to ordinary post-treatment such as collection of precipitated crystals, extraction with an organic solvent, or concentration. If necessary, a purification procedure such as chromatography or recrystallization may be adopted. Thus the cinnoline derivative of the present invention can be obtained.

In the compounds of the present invention, a cinnoline derivative having the formula YO 0

I.COO-M'

0 00 a o o 0o (I-c) oo

A

1

A

2 o0 0 o wherein Y, A 1 and A 2 are as defined above, and M' is an alkali metal cation or an alkaline earth metal cation 20 can be prepared by reacting the cinnoline derivative (Io o0 oo° o b) with a hydroxide having the formula (III): ,o M'OH (III) 0 ouooo wherein M is as defined above.

o! The above reaction is usually carried out in water at a temperature of 0 to 50 0 C for a period of minutes to 5 hours. The hydroxide (III) may be used in an amount of 0.7 to 1 equivalent to one equivalent of the cinnoline derivative Examples of the hydroxide (III) are, for instance, lithium hydroxide, sodium hydroxide, potassium hydroxide, calcium hydroxide, and the like.

After completion of the reaction, if necessary, the water layer is washed with an organic solvent, and then concentrated. Thus.the cinnoline derivative (I-c) of the present invention can be obtained.

In the compounds of the present invention, a L _i II 7 cinnoline derivative having the formula YO O R 4

COONH-R

N >R6 N (I-d) Al A 2 wherein R 4

R

5

R

6 Y, Al and A 2 are as defined above can be prepared by reacting the cinnoline derivative (I- 0 oo 0 b) with an amine having the formula (IV): 4 o. /R S 15 N-R (IV) o o

R

6 0 00 oa wherein R 4

R

5 and R 6 are as defined above.

0, The above reaction is usually carried out S 20 without any solvent or in a solvent, at a temperature of o~ 0 to 100 0 C, for a period of 5 minutes to 3 hours. The amine (IV) may be used in an amount of 1 to 0 equivalents to one equivalent of the cinnioline S, derivative Examples of the solvent are, for instance, I o 0 aromatic hydrocarbons benzene, toluene, xylene), halogenated hydrocarbons chloroform, carbon tetrachloride, dichloroethane, chlorobenzene, dichlorobenzene), ethers diethyl ether, diisopropyl ether, dioxane, tetrahydrofuran, diethylene glycol dimethyl ether), alcohols methanol, ethanol, isopropanol, t-butanol, octanol, cyclohexanol, methyl cellosolve, diethylene'glycol, glycerin), esters (e.g.

ethyl formate, ethyl acetate, butyl acetate, diethyl carbonate), nitro compounds nitroethane, nitrobenzene), nitriles acetonitrile, isobutylnitrile), water, and the like. Their mixtures are also usable.

111111~ IC- I~I 8 After completion of the reaction, the reaction mixture is subjected to ordinary post-treatment such as concentration. If necessary, a purification procedure such as recrystallization may be adopted. Thus the cinnoline derivative can be obtained.

In the compounds of the present invention, a cinnoline derivative wherein R 2

R

3

Y,

can be prepared by YO 0 /R 2 CON

R

N

N (I-e)

A

1 l A 2

A

1 and A 2 are as defined above reacting a halide having the formula YO 0 N (V) wherein Y, A 1 and A 2 are as defined above and W is a halogen atom with an amine having the formula (VI):

/R

2

HN

KR

3

(VI)

wherein R 2 and R 3 are as defined above.

The above reaction is usually carried out without any solvent or in a solvent, in the presence of a dehydrohalogenating agent, at a temperature of 0 to 50 0 Cr i i- 9 for a period of 10 minutes to 3 hours. The amine (VI) and the dehydrohalogenating agent are used in an amount of l'to 5 equivalents and 1 to 2 equivalents respectively, to one equivalent of the halide Examples of the solvents are, for instance, aliphatic hydrocarbons hexane, heptane, ligroin, petroleum ether), aromatic hydrocarbons benzene, toluene, xylene), halogenated hydrocarbons (e.g.

chloroform, carbon tetrachloride, dichloroethane, chlorobenzene, dichlorobenzene), ethers diethyl ether, diisopropyl ether, dioxane, tetrahydrofuran, diethylene glycol dimethyl ether), esters ethyl formate, ethyl acetate, butyl acetate, diethyl carbonate), nitro compounds nitroethane, nitrobenzene), nitriles acetonitrile, isobutylnitrile), tertiary amines pyridine, triethylamine, N,N-diethylaniline, tributylamine, Nmethylmorpholine), acid amides formamide, N,Ndimethylformamide, acetamide), sulfur compound (e.g.

dimethyl sulfoxide, sulfolane), water, and the like.

Their mixtures are also usable.

Examples of the dehydrohalogenating agent are, for instnace, organic bases pyridine, triethyl amine, N,N-diethyl aniline), and the like.

After completion of the reaction, the reaction mixture is subjected to ordinary post-treatment such as extraction with an organic solvent or concentration. If necessary, a purification procedure such as chromatography or recrystallization may be adopted. Thus the cinnoline derivative can be obtained.

The halide is easily prepared by usual acid halogenation of the cinnoline derivative Typical examples of the cinnoline derivatives which can be prepared according to the above procedures are shown in Table 1.

c Table 1 YO 0 Cox 662 Al

A

2 3 4 Al A 2 X Y H H OH CHF 2 IIOKt

O

2-C. It

IQ

4-C itti

ONH

4

I

N (CH 3 2 i 2-F 4-CZ 0C 4

H

9 -n i of 11 OC 2

H

5

I

3-Cz 4-F i 2-C9. 4-Cz

I

4-Br H OH i 11 11 NH-JJi 2-F 4-Br 0C 3

H

7 -i 4-CF 3 H OH oft1 ONa it ItOCH 3 4-SCH 3 toOH of ItOK 4-SCH 3 It0C 2

H

continued 11 continued Al A 2 X Y 4-OCHF 2

H

2-F 4-OCHF 2 3-OCF 3

H

4-OCF 3 I 4-OCF 2 Br I 4-OCF 2 CHC9Z 2

H

OCH

3

OK

0C 2

H

CHF

2 It it it of it to

OH

ONa 0O( -1Ca)

ONH(C

2

H

5 3 0C 2

H

It

OH

ONa 0C 2

H

of 11

CF

3 12 to 19 to of 4-F 4-C%.

11 if 3-F 2-CZ9 4-Br 2-F 3-CF 3 4-CF 3 4- SCH 3 to t 4-C9, it It It

H

4-Br

H

'I

It

OH

OK

OC 2

H

C

2

H

CNH

C

2

H

OH

OK

OCH

3

OC

4

H

9 n

OC

2

H

OCH

3

OC

2

H

OCH

3

OC

3

H

7 -i

OH

ONa 0C 2

H

continued 12 continued Al A 2 X Y 4-OCHF 2 2-OCHF 2 4-OCF 3 it

H

4-F

H

4-OCF 2 Br

H

4-C 2-F 4- SCH 3 4-OCHF 2 4-OCF 3

H

11 2-CZ 4-C z 2-F 3-F 3-C9, 4-Br 4-CF 3 4-SCH 3 4-OCF 3 4-CF 2 Br 4-F 4-Cz 4-Br 4-CF 3 4-SCH 3 2-F It 4-C z

H

It it 4-C.

4-F

H

It it 0C 2

H

5

OCH

3

OH

OK

0C 2

H

OK

0C 2

H

5

OK

OC

3

H

7 -i 0C 3

H

7 -n

OH

0C 2

H

OH

ONa 0C 2

H

OCH

3 0C 2

H

OCH

3 0C 2

H

OK

OH

It

OK

OCH

3

OC

2

H

OH

C2H5 It

CF

3 11 It 11 if it

CF

2 Br to if it it it

CF

2

CF

2

H

of If if 19 it to is

ICF

of of it of of it

OH

It

OK

it

OH

4-OCHF 2 0C 2

H

continued of the compoounct acc:'7rg 1:0 ua.

or diluent to the area where undesired weeds grow or7 will crow.

13 continued Al A 2 X Y 2-CZ 4-F 0C 3 H 7 -n CF 2

CHC'

2 3-CY1 i

OCH

3

I

4-SCH 3 H 0C 2

H

5 t 4-OCF 3 ItI OK

I

H if0C 2 H 5

CF

2 CHFC9, 4-F I tt of OH if if OK I 4-Br ItOCH 3 t 2-F 4-Br OH

I

4-OCF 3 H 0C 2

H

5 i 4-C9, o OK CFCZCHFCZ.

3-C, 4-C9, 0C 2

H

5 i 4-CF 3 H 0C 3

H

7 -n i 4-SCH 3 itOH i '-OCHF 2 to1 H It CF 2

CHFCF

3 4-F 0C 2

H

5 to 4-CZ OK t 2-F 4-C9,

OCH

3 i 4-CF 3 H OC 2

H

5

I

4-SC 2 H 5 if OH

I

4-OCF 3 IfONai In preparing the compound of the present invention, the hydrazone derivative which is the starting material, can be prepared by reacting a ketoester having the formula YO 0

~C-CH

2 COOR (VII)

I

1 14 1 Y- iwith a diazonium salt having the formula (VIII): of ketoester (VII(VIII)

A

2 in which Al and A 2 are as defined above.

The above reaction is usually carried out in a solvent at a temperature of 0 to 50 0 C for a period of minutes to 5 hours. The diazonium salt (VIII) may be used in an amount of 0.7 to 1.5 equivalents to one equivalent of ketoester (VII).

Examples of the solvent are, for instance, ethers diethyl ether, diisopropyl ether, dioxane, tetrahydrofuran, diethylene glycol dimethyl ether), alcohols methanol, ethanol, isopropanol, t-butanol, Soctanol, cyclohexanol, methyl cellosolve, diethylene glycol, glycerin), tertiary amines pyridine, triethylamine, N,N-diethylaniline, tributylamine, Nmethylmorpholine), acid amides formamide, N,Ni dimethylformamide, acetamide), water, and the like.

Their mixture are also usable.

S' For the purpose of conducting the reaction more S 25 efficiently, inorganic bases sodium carbonate, potassium carbonate, sodium acetate, potassium acetate) S'can be added to the reaction system.

After completion of the reaction, the reaction mixture is subjected to ordinary post-treatment such as 30 extraction with an organic solvent or concentration.. If necessary, a purification procedure such as chromatography or recrystallization may be adopted. Thus the desired starting material (II) can be obtained.

The diazonium salt (VIII) is prepared according to an ordinary process from an aniline having the formula

(IX):

in which X is -OH, -0OM, -OR 1 or -N wherein M+ is an alkali metal cation, an alkaline earth 15 1l

H

2 N0

(IX)

in which Al and A 2 are as defined above.

Moreover, the ketoester having the formula (VII) can be prepared in accordance with the following steps.

[Step 1] 1) diazotization 2) H 2 S0 4

-H

2 0 heating

OH

CH

3 ~JIz 0 00 0 0 o. 0 0 000 0 0 Step 2 Case Y :CF 3 1) CSC' 2 2) 14oF 6 heating It 0 00 o0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 C Case (ii) Y :CH 2

CF

3

CF

3

CH

2

OSO

2

CH

3 Case (iii) Y: other than Cases and (ii) HO Y 'Y1 rlK<CH 3 inorganic base (Step 3] 13 oxidation SOCZ 2 16

COOR

1 YO CH2 YO 0 2ea-n-BuLi/THF 1 Yo C-CE COOR -78 0 C--room ztemperature Z

(VII)

In the above scheme, r 1 Y and Z are as defined above, Y' is a polyhalogenated hydrocarbon, which is capable of being added to a phenol and Y" is a C 1

-C

4 haloalkyl group except -CF 3 and -CH 2

CF

3 The compounds of the present invention show an Sexcellent herbicidal activity and an excellent selectivity between crops and weeds. That is, in upland fields, by soil treatment or foliage t eatment, the cinnoline derivatives of the present invention exhibit a herbicidal activity against undesired weeds, for instance, broad-leaved weeds such as wild buckwheat (Polygonum convolvulus), pale smartweed (Polygonum lazathifolium), common purslane (Portulaca oleracea), 20 common chickweed (Stellaria media), common lambsquarters (Chenopodium album), redroot pigweed (Amaranthus retroflexus), radish (Raphanus sativus), wild mustard (Sinapis arvensis), shepherdspurse (Caosella bursapastoris), velvetleaf (butilon theophrasti), prickly sida (Sida spinosa), field pansy (Viola arvensis), cleavers (Galium aDarine), field bindweed (Convolvulus arvensis), purple deadnettle (Lamium purpureum), henbit (Lamium amplexicaure), jimsonweed (Datura stramonium), black nightshade (Solanum nigrum), persian speedwell (Veronica persica), scentless chamomile (Matricaria perforata) and corn marigold (Chrysanthemum segetum); graminaceous weeds such as Japanese millet (Echinochloa frumentacea), barnyardgrass (Echinochloa crus-galli), green foxtail (Setaria virides), large crabgrass (Digitaria sanguinalis), annual bluegrass (Poa annua), blackgrass (Alopecurus myosuroides), oats (Avena sativa), wild oat (Avena fatua), johnsongrass (Sorghum halepense), quackgrass (Agropyron reiens), downy brome (Bromus in which R 1 Y, A 1 and A 2 are as defined above and Z is a fluorine atom, chlorine atom or bromine atom to ring closure with a dehydrohalogenating agent.

The above reaction is usually carried out without any solvent or in a solvent, at a temperature of 0 to 150 0 C, for a period of 10 minutes to 20 hours. The 17 tectorum) and bermudagrass (Cynodon dactylon); commelinaceous weeds such as asiatic dayflower (Commelina communis); cyperaceous weeds such as purple nutsedge (Cyperus rotundus) and rice flatsedge (Cyperus iria); and the like. The cinnoline derivatives of the present invention do not exert any material phytotoxicity to main crops such as corn, wheat, rice, soybean, cotton and sugar beat.

The cinnoline derivatives of the present invention also exhibit a herbicidal activity on various lowland weeds in question, for instance, graminaceous weeds such as barnyardgrass (Echinochloa oryzicola); broad-leaved weeds such as common falsepimpernel (Lindernia procumbens), indian toothcup (Rotala indica) and waterwort (Elatine triandra); cyperaceous weeds such as smallflower umbrellaplant (Cyperus difformis), hardstem bulrush (Scirpus juncoides), needle spikerush (Eleocharis acicularis) and water nutsedge (Cyperus serotinus); and the like without exerting any material phytotoxicity to rice plants in treatment under flooded condition.

When the cinnoline derivatives are employed as an active ingredient in a herbicidal composition of the present invention, they are usually formulated in the form of emulsifiable concentrates, wettable powders, suspensions, granules and the like in combination with Sauxiliary agents such as a solid carrier, liquid carrier and surface active agent. The content of the cinnoline Sderivatives of the present invention as the active ingredient in such formulations is within a range of 0.1 to 90 by weight, preferably 0.2 to 80 by weight.

Examples of the solid carrier are, for instance, fine powders or granules of kaolin clay, attapulgite clay, bentonite, terra alba, pyrophyllite, talc, diatomaceous earth, calcite, walnut powders, urea, ammonium sulfate, synthetic hydrous silicate, and the like. Examples of the liquid carrier are, for instance, aromatic hydrocarbons xylene, methylnaphthalene), tetrabutylammonium chloride, and the like. Exampies u.

the crown ethers are, for instance, dibenzo-18-crown-6, and the like.

After completion of the reaction, the reaction mixture is subjected to ordinary post-treatment such as addition of water followed by collection of precipitated -18 alcohols isopropanol, ethylene glycol, cellosolve), ketones acetone, cyclohexanone, isophorone), vegetable oils soybean oil, cotton seed oil), dimethylsulfoxide, N,N-dimethylformamide, acetonitrile, water, and the like.

Examples of the surface active agent used for emulsification, dispersion or wetting are, for instance, anionic surface active agents such as alkylsulfates, alkylsulfonates, alkylarylsulfonates, dialkylsulfosuccinates and polyoxyethylenealkylaryl ether phosphates; non-ionic surface active agents such as polyoxyethylene alkyl ethers, polyoxyethylene alkylaryl ethers, polyoxyethylene polyoxypropylene block copolymer, sorbitan fatty acid esters and polyoxyethylene sorbitan fatty acid esters; and the like.

Examples of the auxiliary agents other than above are, for instance, ligninsulfonates, alginates, polyvinyl alcohols, gum arabic, CMC (carboxymethyl cellulose), PAP (isopropyl acid phosphate), and the like.

As the method for controlling undesired weeds of the present invention, the cinnoline derivatives of the present invention are usually formulated and used in soil treatment, foliage treatment or treatment under flooded condition before the emergence of weeds or within about one month after the emergence of weeds to the area where undesired weeds grow or will grow. Soil treatment includes soil surface treatment, soil incorporation treatment, and the like. The foliage treatment includes, in addition to the treatment of the plant over the top, directed application wherein herbicides are applied only to weeds so as not to attach to crops, and the like.

The cinnoline derivatives of the present invention may be used together with other herbicides to improve their activity as herbicides.

Further, they may applied in combination with insecticides, acaricides, nematocides, fungicides, plant growth regulators, fertilizers, soil improvers, and the like.

I

1j t~~-aUojL l IyuLruxiae, ana tne liKe. When the alkali is used, the reaction mixture is neutralized with hydrochloric acid, sulfuric acid, nitric acid, formic acid, acetic acid, or the like after completion of the reaction.

After completion of the reaction, the reaction 4o, 19 Furthermore, the cinnoline derivatives of the present invention can be used as an active ingredient of a herbicide for paddy field, upland field, orchard, pasture land, lawn, forest, non-agricultural field, and the like.

The dosage rate of the cinnoline derivatives of the present invention varies depending on weather conditions, preparation form, prevailing season, mode of application, soil involved, crop and weed species aimed at, and the like. Generally, however, the dosage rate is from 0.5 to 500 grams, preferably from 1 to 300 grams of the active ingredient per are. The herbicidal composition of the invention formulated into emulsifiable concentrate, a wettable powder, a suspension, or the like is ordinarily employed by diluting a designed amount of it with water, if necessary with addition of an auxiliary agent such as a spreading agent, at a volume of 1 to liters per are. The herbicidal composition formulated into granule and the like is usually applied without any dilution.

Examples of the wetting agent are, in addition to the surface active agents as noted above, for instance, polyoxyethylene resin acid (ester), ligninsulfonate, abiethylenic acid salt, dinaphthyl- 25 methanedisulfonate, paraffin, and the like.

The present invention is more specifically described and explained by means of the following Examples, Reference Example, Formulation Examples and Test Examples, wherein the compound Nos. of the active ingredient corresponds to those in Table 2. It is to be understood that the present invention is not limited to the Examples, Formulation Examples, and Test Examples and various changes and modifications may be made in the invention without departing from the spirit and scope thereof.

Example 1 [Preparation of the compound No. 33] Ethyl 2-[(4-trifluoromethoxyphenyl)-l,l- L i II.^ a uiu IIY u2Lnutur ana xne iKe.

After completion of the reaction, if necessary, the water layer is washed with an organic solvent, and then concentrated. Thus the cinnoline derivative (I-c) of the present invention can be obtained.

In the compounds of the present invention, a 1 4i diazanediyl]-(2-fluoro-6-difluoromethoxybenzoyl)acetate (530 mg), and potassium carbonate (157 mg) were added to N,N-dimethylformamide (10 mi), and the resultant mixture was heated at 100 0 C for 1 hour. The mixture was cooled to room temperature, and was poured into ice-water (about mi). After allowing it to stand for 2 hours, the precipitated crystals were collected by filtration. The crystals were washed with water (5 ma) two times and were dried under reduced pressure to give 478 mg of desired ethyl 1-(4-trifluoromethoxyphenyl)-l,4-dihydro-4-oxo-5difluoromethoxycinnoline-3-carboxylate (yield: 94.3 145 0

C

Example 2 [Preparation of the compound No. Ethyl 2-[(2-fluoro-4-chlorophenyl)-l,ldiazanediyl]-(2-fluoro-6-difluoromethoxybenzoyl)acetate (460 mg) and potassium carbonate (137 mg) were added to N,N-dimethylformamide (10 mz), and the resultant mixture was heated at 1000C for 1 hour. The mixture was cooled to room temperature, and was poured into ice-water (about mZ). After allowing it to stand overnight, the precipitated crystals were collected by filtration, washed with water (5 two times and were dried under reduced pressure to give 410 mg of desired ethyl 1-(2fluoro-4-chlorophenyl)-1,4-dihydro-4-oxo-5difluoromethoxycinnoline-3-carboxylate (yield: 93.8 Sm.p., 140-142 0

C

Example 3 [Preparation of the compound No. Ethyl 1-(4 :rifluoromethoxyphenyl)-1,4-dihydro- 4-oxo-5-difluoromethoxycinnoline-3-carboxylate (200 mg) and a 1 N aqueous solution of sodium hydroxide (0.93 ma) were added to a mixed solvent of ethanol (5.5 mz) and water (1.5 mz), and the resultant mixture was stirred at to 80°C for 3 hours. After being allowed to cool to room temperature, the mixture was diluted with water cellosolve, diethylene glycol, glycerin), esters (e.g.

ethyl formate, ethyl acetate, butyl acetate, diethyl carbonate), nitro compounds nitroethane, nitrobenzene), nitriles acetonitrile, isobutylnitrile), water, and the like. Their mixtures are also usable.

21 mi), and washed with ethyl acetate (20 mZ). The pH of the water layer was adjusted to pH 2 with concentrated hydrochloric acid to precipitate crystals. The precipitated crystals were collected by filtration, washed with water (5 m9) two times, and dried under reduced pressure to give 120 mg of desired 1-(4trifluoromethoxyphenyl)-1,4-dihydro-4-oxo-5difluoromethoxycinnoline-3-carboxylic acid (yield: 64.2 236.5 0

C

Example 4 [Preparation of the compound No. 31] 1l-(4-Trifluoromethoxyphenyl)-1,4-dihydro-4-oxoo 1 5-difluoromethoxycinnoline-3-carboxylic acid (120 mg) and 15 a 1 N aqueous solution of sodium hydroxide (0.265 ma) were added to water (5 and the mixture was stirred at room temperature for 1 hour. The resultant mixture was washed with ethyl acetate (10 ma). After removing the water, the obtained crystals were dried to give 91 mg S 20 of desired sodium l-(4-trifluoromethoxyphenyl)-1,4dihydro-4-oxo-5-difluoromethoxycinnoline-3-carboxylate (yield: 78.4 165-169 0

C

Some of the cinnoline derivatives of the present invention obtained according to these process as above are shown in Table 2.

Table 2 YO 0

COX

N

A A 2 4 i i wherein R 2 and R3are as defined above.

The above reaction is usually carried out without any solvent or in a solvent, in the presence of a dehydrohalogenating agent, at a temperature of 0 to 500C, 22 Compound 12Melting No.. A 1

A

2 X Y point (OC) 1 2 3 4 6 7 8 9 11 12 13 14 16 17 18 19 21 22 23 24 26 27 28 29 31 11 4-F

OH

0OK

OC

2

H

5 ONa 0C 2

H

5 2-C9, 4-C.

4-Br It it 2-F 11

OH

I' OK 'I C 2

H

5 'I OH 'I ONa 0C 2

H

5 4-C. OH 11 ONa If 0C 2

H

5 4-Br OH of 0C 2

H

5 Ar' it CHF 2 It It it If it it 261-263 277-279 159-161 24 8-2 185.5 191.7 256.8 27 0-27 198.3 26 0-26 3 211-215 192-194 206.5 24 0-2 46 140-142 20 8-210 137-140 14 2-14 6 176 26 6-26 8 260-265 138-144 26 0-26 3 2 40-2 >300 192.8 2 37-2 41 18 3-187 141.7 236.5 16 5-16 9 if 4-C9, 3-C 4 4-CF 3 4-OCHF 2 It 4-OCF 3 11 -F OH It ONa it

C

2

H

5 H OH ItONa

I'OK

I' C 2

H

5 itOH I'ONa I' C 2

H

5

IIOH

'IONa continued Typicai examples or tne cinnoiine derivatives which can be prepared according to the above procedures are shown in Table 1.

iv 23 continued Compound 1 2 Melting No. A X Y point (oC) 32 4-OCF 3 H OK CHF 2 267-270 33 OC2H 5 145 34 4-SCH 3 OH 253-256

OC

2

H

5 152-156 36 4-OCF 2

CHF

2 162.1 37 4-C, OH CF 3 264-268 38 OK 270-274 39 OC 2 H5 207-209 4-OCF3 OH 269-270 41 OK 205-210 42 OC 2

H

5 145-148 43 4-CS CH 2

CF

3 172.9 44 4-Br 176.6 4-Cz OH CF 2

CHF

2 197-200 46 1" OK 265-272 47 OC 2

H

5 127-130 48 4-OCF 3 OH 254-261 49 OK 290-300

OC

2

H

5 147-149 An example of process for preparing the hydrazone derivative which is the starting material of the compound of the present invention is shown in the following Reference Example.

Reference Example 1 To 4-trifluoromethoxyaniline (289 mg) were added water (3 mz) and concentrated hydrochloric acid (1 mz) to give a solution. To the solution was added dropwise a solution of sodium nitrite (124 mg) in water (2 mz) over about 5 minutes while cooling with ice to give a solution of a diazonium salt. The obtained

OCH

3 4-SCH 3 OH OK 4-SCH 3 OC 2

H

-continued

I.

24 solution was added dropwise to a solution of ethyl 2fluoro-6-difluoromethoxybenzoyl acetate (500 mg, purity a mixed solvent of 70 methanol (8 mi) and pridine (0.8 mz) at 10 to 20 0 C over about 10 minutes.

After the reaction mixture was stirred at room temperature for 1 hour, the resultant mixture was added to ice-water (30 mi) containing a lN hydrochloric acid (2 the resultant mixture was extracted with ethyl acetate (30 two times. The extract was washed with water (20 mi) and a saturated saline solution (20 m.) successively, and was dried over anhydrous magnesium sulfate. The solid obtained by removing ethyl acetate under reduced pressure was washed with a mixed solvent of hexane and ethanol to give 530 mg of desired ethyl trifluoromethoxyphenyl)-l,l-diazanediyl]-(2-fluoro-6difluoromethoxybenzoyl)acetate (yield: 70 80.5 0

C

Formulation Examples are shown below. In the Formulation Examples, all parts are by weight.

Formulation Example 1 Fifty parts of any one of Compound Nos. 5, 6, 7, 8, 9, 12, 15, 19, 26, 27, 29, 32, 33, 43 and 44, 3 parts of calcium ligninsulfonate, 2 parts of sodium laurylsulfate and 45 parts of synthetic hydrous silicate are well mixed to obtain a wettable powder.

Formulation Example 2 Ten parts of any one of Compound Nos. 5, 6, 7, 9, 12, 15, 19, 26, 27, 29, 33, 43 and 44, 14 parts of polyoxyethylenestyrylphenyl ether, 6 parts of calcium dodecylbenzenesulfonate, 30 parts of xylene and 40 parts of cyclohexanone are well mixed to obtain an emulsifiable concentrate.

Formulation Examole 3 Two parts of any one of Compound Nos. 5, 6, 8, 4-cr 3 V"3I7 4-SCH3

OH

t I ONa

OC

2

H

-continued 25 9, 12, 15, 26, 29, 32 and 43, 1 part of synthetic hydrous silicate, 2 parts of calcium ligninsulfonate, 30 parts of bentonite and 65 parts of kaolin clay are well pulverized and mixed together. The mixture is then kneaded with water, granulated and dried to obtain a granule.

Formulation Example 4 Twenty-five parts of any one of Compound Nos.

6, 7, 8, 9, 12, 15, 19, 26, 27, 29, 32, 33, 43 and 44, 3 parts of polyoxyethylene sorbitan monooleate, 3 parts of CMC and 69 parts of water are mixed and pulverized until the particle size of the mixture becomes not more than 5 microns to obtain a suspension.

Formulation Example Three parts of any one of Compound Nos. 2, 8, 32, 38 and 41, 1 part of polyoxyethylenestyrylphenyl ether and 96 parts of water are well mixed to obtain a liquid formulation.

The herbicidal activity of the compounds are illustratively shown in the following Test Examples wherein the degree of germination and the degree of growth inhibition are observed with the naked eye and herbicidal activity is rated with an index 0, 1, 2, 3, 4, 6, 7, 8, 9 or 10, in which the numeral indicates no material difference is seen in comparison with the untreated plant and the numeral "10" indicates the complete inhibition or death of the test plants.

Compounds A, B, C, D and E used for comparison are shown in Table 3.

-L 4-CF 3 4-SCH 3 2-F If OK It

OH

4-OCHF 2 0C 2

H

continued 26 Table 3 Compbund No. Formula Remarks 4 k COC 2

E

5 coumarin the compound disclosed in European Patent Publication No. 197226 Al

ICOOC

2

H

CF

3

,,CH

3 E NHCN

CEH

3 fluometuron YO 0

C-CH

2

COOR

z

(VII)

~ab -~U~ib_41~-i-f 27 Test Example 1 Plow-field soil was filled in a cylindrical plastic pot (diameter: 10 cm, height: 10 cm), and the seeds of Japanese millet and oats were sowed and covered with the soil. A prescribed amount of the test compound formulated into emulsifiable concentrate or liquid formulation according to Formulation Example 2 or 5 was diluted with water of an amount corresponding to liters/are, and applied to the soil surface by means of a small-sized sprayer. After treatment, the test plants were cultivated for 20 days in a greenhouse to examine the herbicidal activity. The results are shown in Table 4.

Table 4 Herbicidal activity Compound Dosage No. (g/are) Japanese millet Oats 40 10 6 40 10 8 40 10 9 40 10 12 40 10 40 10 19 40 10 26 40 10 27 40 10 29 40 10 33 40 10 43 40 10 44 40 10

T

est Example 2 The seeds of Japanese millet, oats and radish were sowed in cylindrical plastic pots (diameter: 10 cm, The diazonium salt (VIII) is prepared according to an ordinary process from an aniline having the formula

(IX):

I 28 height: 10 cm) filled with plow-field soil, and cultivated in a greenhouse for 10 days. A prescribed amount of the test compound formulated into emulsifiable concentrate or liquid formulation according to Formulation Example 2 or 5 was diluted with water containing a spreading agent, and the dilution was sprayed over the foliage of the test plants by means of a small-sized sprayer at a spray volume of 10 liters/are.

The test plants were further grown in a greenhouse for days, and the herbicidal activity was rated. The results are shown in Table i0 0, f3 z oxidation 2 COOH SOC91 2 29 Table Herbicidal activity Compound Dosage No. (g/are) Japanese Oats Radish millet 0 0 green foxtail (Setaria virides), large crabgrass ide (Diitaria sanguinalis), annual bluegrass (Poa annua), blackgrass (Alopecurus myosurides), oats (Avena sativa) wild oat (Avena fatua), johnsongrass (Sorghum halepense), quackgrass (Agropyron repens), downy brome (Bromus 30 Test Example 3 The seeds of velvetleaf were sowed in cylindrical plastic pots (diameter: 10 cm, height: 10 cm) filled with plow-field soil, and cultivated in a greenhouse for 10 days. A prescribed amount of the test compound formulated into emulsifiable concentrate or liquid formulation according to Formulation Example 2 or was diluted with water containing a spreading agent, and the dilution was sprayed over the foliage of the test plants by means of a small-sized sprayer at a spray volume of 10 liters/are. The test plants were further grown in a greenhouse for 20 days, and the herbicidal activity was rated. The results are shown in Table 6.

Table 6 Herbicidal activity Compound Dosage No. (g/are) Velvetleaf 7 6 40 7 7 40 7 9 40 7 26 40 7 Test Example 4 Cylindrical plastic pots (diameter: 8 cm, height: 12 cm) were filled with paddy field soil, and the seeds of barnyardgrass were sowed in 1 to 2 cm depth.

Water was poured therein to make a flooded condition.

The test plants were grown in a greenhouse. Six days (at that time weeds began to germinate) thereafter, a prescribed amount of the test compound formulated into emulsifiable concentrate or liquid formulation according to Formulation Example 2 or 5 was diluted with water .r attapulgite clay, bentonite, terra alba, pyrophyllite, talc, diatomaceous earth, calcite, walnut powders, urea, ammonium sulfate, synthetic hydrous silicate, and the like. Examples of the liquid carrier are, for instance, aromatic hydrocarbons xylene, methylnaphthalene),

I

~P~I i i--i 31 mz) and applied to the water surface. The test plants were grown for further 20 days in the greenhouse, and the herbicidal activity was rated. The results are shown in Table 7.

Table 7 Herbicidal activity Compound Dosage No. (g/are) Barnyardgrass 1 40 2 40 3 40 5 40 6 40 7 40 8 40 9 40 10 40 12 40 40 19 40 23 40 25 40 26 40 27 40 29 40 40 32 40 33 40 34 40 40 39 40 42 40 43 40 44 40 L j

"I

32 Test Example Paddy field soil was filled in 1/5000 ares Wagner's pots, and the seeds of barnyardgrass were sowed in 1 to 2 cm depth in the soil. After creating the state of paddy field by flooding, rice seedlings in a 3-leaf stage were transplanted and cultivated in a greenhouse.

After 5 days, a prescribed amount of the test compound formulated into emulsifiable concentrate or liquid formulation according to Formulation Example 2 or 5 was diluted with 10 mz of water and applied to the water surface, and the depth of water was made 4 cm. After treatment, the test plants were cultivated for 20 days in a greenhouse to examine the herbicidal activity. The results are shown in Table 8. In this test, water leakage corresponding to a water level of 3 cm/day was carried out for 2 days from the day subsequent to the treatment.

I-u..e)aY 33 Table 8 Herbicidal activity Compound Dosage No. (g/are) Rice Barnyardgrass 2.5 3 0.63 0 6 2.5 1 0.63 0 9 2.5 0 0.63 0 8 12 2.5 0 0.63 0 2.5 0 0.63 0 26 2.5 0 0.63 0 29 2.5 2 0.63 0 32 2.5 3 0.63 2 43 2.5 2 0.63 0 A 40 0 0 0 0 B 40 6 9 4 C 10 0 8 0 0 D 40 0 4 0 0 Test Example 6 Plow-field soil was filled in a vat (area: 33 x 23 cm 2 height: 11 cm) and the seeds of cotton, L i i.

9 34 morning glories, common cocklebur, barnyardgrass and Johnsongrass were sowed and cultivated for 18 days.

Thereafter, a prescribed amount of the test compound formulated into emulsifiable concentrate or liquid formulation according to Formulation Example 2 or 5 was diluted with a spreading agent-containing water of an amount corresponding to 5 liters/are, and uniformly applied to the entire foliage of the test plants over the top by means of a small-sized sprayer. The state of growth of the weeds and crops at that time varied with the kind thereof, but they were in a cotyledonous stage and from 5 to 19 cm in height. Twenty days after treatment, the herbicidal activity was examined. The results are shown in Table 9.

These tests were carried out in a greenhouse through the entire period of test.

Table 9 Herbicidal activity Compound Dosage No. (g/are) Cotton Morning- Common Barnyard- Johnsonglories cocklebur grass grass 7 20 0 8 7 8 7 0 8 7 8 20 0 8 8 9 0 7 8 8 9 20 0 8 8 7 8 0 8 7 32 20 0 8 9 9 9 0 8 8 9 9 E 20 2 8 5 5 0 8 0 0 0 ~I 36 In addition to ingredients used in the Examples, Reference Example, Formulation Examples and Test Examples, other ingredients can be used in the Examples as set forth in the specification to obtain substantially the same results.

Claims (2)

1. A cinnoline derivative having the formula YO 0 P1- 4 /2 4 in which X is -OH, Rl or -N/ \R3 wherein M+ is an alkali metal cation, an alkaline earth R 6 metal cation or HN-R in which R 4 R 5 and R 6 are the \R6 7 8 9 11 12 13 14 16 17 18 19 21 22 23 24 same or different and each is a hydrogen atom, a C1_Cg alkyl group, a C 3 -C 4 alkenyl group, a C 3 -C 4 alkynyl group, a C 3 -C 8 cycloalkyl group, a benzyl group or a phenyl group; R 1 is a C 1 -C 9 alkyl group, a C3_Cg alkenyl group, a C 3 -C 4 alkynyl group, a C 1 -C 3 alkoxy- (C 1 -C 4 alkyl group, a C 1 -C 3 haloalkyl group, a C3_C8 cycloalkyl group, a benzyl group or a phenyl group; and 2 and R 3 are the same or different and each is a hydrogen atom, a C 1 -C 6 alkyl group, a C 3 -C 4 alkenyl group, a C 3 -C 4 alkynyl group, a C 3 -C 8 cycloalkyl group, a benzyl group in which at most two of hydrogen atoms at the a-position thereof may be substituted by methyl group, a C 2 -C 3 hydroxyalkyl group or a phenyl group in which at most three of hydrogen atoms thereof may be substituted by the same or different C 1 -C 2 alkyl group or halogen atom; Y is a C 1 -C 4 haloalky group; A and A 2 are the same or different and each is a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a trihalomethyl group, a iU~- 38 26 C 1 -C 2 alkylthio group or a C 1 -C 2 haloalkoxy group. 1 2. The cinnoline derivative according to Claim 2 1, in which X is -OH, -O-M or -OR 1 1 3. The cinnoline derivative according to Claim 2 2, in which A 1 is a fluorine atom, a chlorine atom, a 3 bromine atom, a trifluoromethyl group, a difluoromethoxy 4 group or a trifluoromethoxy group and A 2 is a hydrogen atom or a fluorine atom. 1 4. The cinnoline derivative according to Claim 2 3, in which Y is a C 1 -C 2 polyfluoroalkyl group. 1 5. The cinnoline derivative according to Claim 2 4, in which Y is a difluoromethyl group. 1 6. The cinnoline derivative according to Claim 2 4, in which Y is a trifluoromethyl group. 1 7. The cinnoline derivative according to Claim 2 4, in which Y is a 2,2,2-trifluoroethyl group. 1 8. A process for preparing a cinnoline 2 derivative having the formula YO 0 COOR 1 N 3 N (I-a) Al A 2 4 in which R 1 is a C 1 -C 9 alkyl group, a C 3 -C 6 alkenyl group, a C 3 -C 4 alkynyl group, a C 1 -C 3 alkoxy (C 1 -C 4 6 alkyl group, a C 1 -C 3 haloalkyl group, a C 3 -C 8 cycloalkyl 7 group, a benzyl group or a phenyl group; Y is a CI-C 4 8 haloalkyl group; A 1 and A 2 are the same or different and i. "iim-* L lm~ 39 9 each is a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a trihalomethyl group, a Cl-C 2 11 alkylthio group or a CI-C 2 haloalkoxy group 12 which comprises subjecting a hydrazone derivative having 13 the formula (II): YO 0 6 COOR 1 N 14 Z NH (II) A 1 A 2 in which 1 R, Y, A 1 and A 2 are as defined above; and Z is 16 a fluorine atom, a chlorine atom or a bromine atom to 17 ring closure with a dehydrohalogenating agent. 1 9. A process for preparing a cinnoline 2 derivative having the formula YO 0 COOH N 3 N (I-b) Al-A 2 4 in which Y is a C 1 -C 4 haloalkyl group; A 1 and A 2 are the same or different and each is a hydrogen atom, a fluorine 6 atom, a chlorine atom, a bromine atom, a trihalomethyl 7 group, a C 1 -C 2 alkylthio group or a C 1 -C 2 haloalkoxy 8 group 9 which comprises hydrolyzing a cinnoline derivative having the formula L _i I C COOR 1 11 N (I-a) A 1 A 2 12 in which R 1 is a Cl-C 9 alkyl group, a C 3 -C 6 alkenyl 13 group, a C 3 -C 4 alkynyl group, a C 1 -C 3 alkon-y (C 1 -C 4 14 alkyl group, a C 1 -C 3 haloalkyl group, a C 3 -C 8 cycloalkyl group, a benzyl group or a phenyl group; and Y, A 1 and A 2 16 are as defined above. 1 10. A process for preparing a cinnoline 2 derivative having the formula YO 0 COOVM'+ N 3 N (I-c) Al A 2 4 in which Y is a C 1 -C 4 haloalkyl group; A 1 and A 2 are the same or different and each is a hydrogen atom, a fluorine 6 atom, a chlorine atom, a bromine atom, a trihalomethyl 7 group, a Cl-C 2 alkylthio group or a C 1 -C 2 haloalkoxy 8 group; and M is an alkali metal cation or an alkaline 9 earth metal cation which comprises reacting a cinnoline derivative having 11 the formula YO 0 wCOOH 12 N (I-b) Al j A 2 41 13 in which Y, A 1 and A 2 are as defined above 14 with a hydroxide having the formula (III): M'OH (III) 16 wherein M is as defined above. 1 11. A process for preparing a cinnoline 2 derivative having the formula YO 0 R 4 ,COONH-R NR6 3 N (I-d) A' A 2 4 in which R 4 R 5 and R are the same or different and each is a hydrogen atom, a C 1 -C 6 alkyl group, a C 3 -C 4 alkenyl 6 group, a C 3 -C 4 alkynyl group, a C 3 -Cg cycloalkyl group, a 7 benzyl group or a phenyl group; Y is a C 1 -C 4 haloalkyl 8 group; Al and A2 are the same or different and each is a 9 hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a trihalomethyl group, a C 1 -C 2 alkylthio 11 group or a C 1 -C 2 haloalkoxy group 12 which comprises reacting a cinnoline derivative having 13 the formula YO 0 COOH N 14 N (I-b) A 1 A 2 in which Y, Al and A 2 are as defined above 16 with an amine havi the formula (IV): i 42 /R 4 17 N-R 5 (IV) R6 18 in which R 4 R 5 and R 6 are as defined above. 1 12. A process for preparing a cinnoline i 2 derivative having the formula 'I YO 0 /R 2 CON \R 3 N O (I-e) A 1 A 2 4 in which R 2 and R 3 are the same or different and each is a hydrogen atom, a C 1 -C 6 alkyl group, a C 3 -C 4 alkenyl 6 group, a C 3 -C 4 alkynyl group, a C 3 -C 8 cycloalkyl group, a 7 benzyl group wherein at most two of hydrogen atoms at the i 8 a-position thereof may be substituted by methyl group, a i 9 C 2 -C 3 hydroxyalkyl group or a phenyl group wherein at most three of hydrogen atoms thereof may be substituted 11 by the same or different Cl-C 2 alkyl group or halogen 12 atom; Y is a Cl-C 4 haloalkyl group; A and A2 are the 13 same or different and each is a hydrogen atom, a fluorine 14 atom, a chlorine atom, a bromine atom, a trihalomethyl group, a C 1 -C 2 alkylthio group or a Cl-C 2 haloalkoxy 16 group 17 which comprises reacting a halide having the formula YO 0 18 N (V) 1 43 19 in which Y, Ai and A 2 are as defined above; and W is a halogen atom 21 with An amine havinc the formula (V7): 22 __N(71) 23 inwihR n -are as defined above.

£2 113. A hezbicidal composition compr ising as an 0 0 2 active ingredielnt a herbicidallv effective amount of the £20003 convoound accordinc to Claim 2. and an inert carrier or Co4 diluent. 1 14. A rnet-oc for controlling undes-ired weeds, 2 wh~ch comprises a==plying a herbicidallv ef-fective amount 3 of 'the compound acc-rding to Claim 1 and an inert carrier O4 or diluent to the area where undesired weeds grow or will grow. 1 15. A cinnoline derivative in accordance 2 with. claim I substantially as herein described with 03 referenre to the examples. 01 16. A process in accordance with claim 9 o 02 substantially as herein described with reference to 3 the examples. DATED this 28th Day of November, 1990 SUMITOMO CHEMICAL COMPANY, LIMITED Attornny:' IAN~ ERN3T j io nsjtih. ,f o-bar~cnt Attorney., of A'ustraili- of sxILajcS i N XA'ER